EP 2381131 B1 20121226 - Hydraulic auto-tensioner and belt transmission device
Title (en)
Hydraulic auto-tensioner and belt transmission device
Title (de)
Hydraulischer Selbstspanner und Riemenübertragungsvorrichtung
Title (fr)
Tendeur automatique hydraulique et dispositif à transmission par courroie
Publication
Application
Priority
JP 2010097095 A 20100420
Abstract (en)
[origin: EP2381131A1] The object is to provide a hydraulic auto-tensioner which can stably start the engine of an idling stop vehicle and which can be manufactured at a low cost. A hydraulic auto-tensioner comprising a cylinder 17 filled with hydraulic oil therein, a rod 21 inserted in the cylinder 17, a plunger 22 provided at the bottom end of the rod 21, slidably fit in the inner diameter face of the cylinder 17, defining a leak gap 24 therebetween, defining a pressure chamber 25 therebelow and a reservoir chamber 26 thereabove and formed with a path 28 communicating the pressure chamber 25 with the reservoir chamber 26, the path 28 being provided with a check valve that closes the path 28 when the pressure in the pressure chamber 25 exceeds the pressure in the reservoir chamber 26, and a return spring 31 provided outside the cylinder 17 and biasing the cylinder 17 and the rod 21 in extending direction, wherein the size of the leak gap (24) is determined such that the leak down time when a load of 980 N is applied to the plunger (22) is 0.65 seconds/mm or over.
IPC 8 full level
CPC (source: EP)
F16H 7/1236 (2013.01); F16H 2007/0806 (2013.01); F16H 2007/0859 (2013.01); F16H 2007/0893 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
EP 2381131 A1 20111026; EP 2381131 B1 20121226; JP 2011226564 A 20111110; JP 5574229 B2 20140820
DOCDB simple family (application)
EP 10161046 A 20100426; JP 2010097095 A 20100420